Thanks for the reply Greg.In terms of size, well it depends. My mother prefers a more light weight portable camera, but my dad wants a more serious camera because he is more passionate about photography. The only way to know what works for them is to take them to the store tomorrow.So in terms of a light and portable camera would you say the G15 is a good buy while the T3i is better for more serious shooting? Keep in mind at a price of $700 or less, would these be the best...